Roy Murphy is played by Toby Huss in Cowboys & Aliens.
He's a man of the Colonel Woodrow Dolarhyde.
He's a drunkard and likes to make fun of the colonel in his absence. With Little Mickey and Ed, Roy is in charge of monitoring the Dolarhyde cattle. He's the only one to survive to the aliens attack. Later, he is tortured by his boss when this one wants to know where his cattle is but he's finally spared.